Electronic interferometer capacitively coupled to a quantum dot

Details Electronic interferometer capacitively coupled to a quantum dot Electronic interferometer capacitively coupled to a quantum dot

2009-01-17

arxiv.org/abs/0901.2626v2

Phys. Rev. B 80, 113307 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.80.113307

We theoretically study electron interference in a ballistic electronic interferometer capacitively coupled to a quantum dot. The visibility of the interference is reduced when the dot has degenerate ground states with different excess charges. The degree of the reduction depends on system parameters such as the strength of the capacitive coupling, and the dependence is analyzed in the regime where the dwell time of electrons in the dot is much longer than the electron flight time through the interferometry region coupled to the dot. The result is consistent with recent experimental data.

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